Big Data is data whose scale,distribution,diversity, and/or timeliness require the use of new technical architecture and analyst to enable insights that unclock new resources of business value.

Orginasations are deriving business benefits from analyzing ever larget and more complex data sets that increasingly require real time or near-real time capabilities.
There are multiple characteristics of big data,but four stand out as defining characteristics:
1.Huge volume of data
2.speed or velocity of new data creation.
3.The variety of data created(structured,semi-structured,unstructured)
4.Complexity of data types and structures, with an increasing volume of unstructured data-part of the Digital Shadow or "Data Exhaust".